OPW 71SO-TOOLC - Page 18

18
PREVENTIVE MAINTENANCE
Annually, inspect the apper in the 71SO to see that it is
open by looking down the drop tube opening (see in-
spection procedure below). Test the 71SO drop tube
seals with CARB procedure TP-201.1D. If the drop tube
seal passes testing, no further maintenance is required.
If the drop tube fails testing, replace the drop tube seal
with OPW P/N: H11931M for 4” Tubes. Re-test the 71SO
drop tube with CARB procedure TP-201.1D. The lower
tube o-ring seal OPW P/N: H14840M can also be re-
placed. If this does not correct the leak the 71SO needs
to be replaced.
FOR TESTABLE MODELS ONLY: The socket adaptor
can be removed and poppet and oat movement and
function inspected without removing the valve. See
Page 17 for full testing details. If replacement parts are
needed for testable models the following items are
available: OPW P/N 206741 Testable Inlet Tube S/A,
206740 Socket Adaptor and Cable Assembly, and 61SOK
-0001 Float Kit.
CAUTION: Do not insert any foreign object into drop
tube if apper is in the closed position. For exam-
ple, a tank level measuring stick. This will damage
the valve and void the Warranty. ALWAYS check
apper location before “sticking” the tank. If ap-
per is in the closed position, the tank is either over-
lled and you need to wait until the liquid level goes
down or the 71SO is damaged and needs to be re-
placed.
Inspection Procedure to Ensure Proper Operation
Note: For testable models valve does not need to be
removed from tank. See page 17 for testable instruc-
tions.
INSP 1. Remove the overll valve from the tank as de-
scribed in step 26.
INSP 2. Visually inspect the valve for damage. Make
sure no debris or foreign objects are in or on the valve.
INSP 3. With the oat in the normal (down) position,
visually inspect the valve to ensure the poppet is not
exposed outside the deection shield. See Figure 27.
Good Valve
Bad Valve
Note: Figure 27 shows poppet location with oat arm
not activated.
INSP 4. Inspect the oat by lifting upward. The oat
should move freely without any binding. See Figure
28.
INSP 5. View down the tube to ensure the poppet is
moving into the ow path when lifting the oat. See
Figure 29.
Figure 27
Figure 28